Decades ago, people were smaller and thinner, and decent tits were rare, so the one with the biggest tits would get the job.
Nowadays, there is so much gross obesity around that the one with the biggest tits will have them touching the floor and she is likely to develop serious back problems
I interviewed one the other day. Poor woman could hardly walk.
Nowadays, in the UK, it would be the one with the smallest tits that would get the job!